Run CI on tags too

Needed for docs builds of post tags.
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f38fd91..627aa42 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -4,6 +4,7 @@
 on:
   push:
     branches: ["main"]
+    tags: ["*"]
   pull_request:
     branches: ["main"]
   workflow_dispatch: